Cisco WAN :: Windows 7 Cannot Obtain An IP Address From 4503 Core Switch

Dec 14, 2011

we have Core-Siwtch 4503 in the main building which is connected to another Core 4503-E in another building ,, now our PCs connected to the 4503-E ,,, any XP M/C can  pick an Dhcp-ip but and M/C run Win.7 Cannot !!

action taken :
1st we try to connect our win 7 pc in the node which was connected to xp M/C ,, and it didnot take ip from the DHCP . ,, 2
2nd we ensure from the core-switch configuration and its normal with no mistake
3rd trying to use tool from Microsoft Fix-it Center whih name is ( Microsoftfixit 50475 ) which is just .msi file but the problem face us is that this tool donnot accept to run on win 7 cause its made for vista .
4th after some researchs we notic that there is some modifications have to be performed on registery by disabling the dhcp broadcast flag we did it but nothing change yet
5th now we are waiting to perform another action which is Disable the IP Helper service in win 7

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Cisco Switching/Routing :: Very High CPU Utilization Core Switch 4503?

Feb 14, 2012

We  had a core switch(30 vlans) in our environment and it's noticed that  CPU utilization of the core switch is showing high during recent days. I  have checked logs and processes, but couldn't find the root cause. The  issue found only in the office hourly only(after that the cpu  utilization is idle and normal). I have already referred the following  link to troubleshoot the issue " [URL]
see the following outputs from the core switch
CPU utilization for five seconds: 99%/0%; one minute: 99%; five minutes: 99%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
  30   6687557041432420936        466 47.52% 47.10% 45.98%   0 Cat4k Mgmt LoPri
  55  30667074884269560256          0 45.36% 45.50% 45.85%   0 IP Input
  29  28552856922870089254          0  3.59%  3.50%  3.57%   0 Cat4k Mgmt HiPri

Note: Each Invalid source mac entry in each day from same port (above is the output after clearing logs before 3 days)
My queries regarding the issues are following
1) How can we find root cause regarding the high cpu utilization?

2) Is a single invalid mac address makes the cpu highly utilized for suppressing it?

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Cisco Switching/Routing :: WS-4503 - Core Switch Having High CPU Load

Jan 13, 2012

We have two core switches in our network (Cisco WS-4503). HSRP is working as Active-Standby mode. Recently it has been found that core 1 (which is in active mode) shown high CPU load (60% - 100%). Also found that the below mentioned process takes more CPU. Our network consist of around 30 Vlans. We have already checked for the solution in Cisco website [URL]  but couldn't find exact reason. see the below outputs for core 1 switch.
Core1# sh processes cpu sorted
CPU utilization for five seconds: 55%/3%; one minute: 65%; five minutes: 71%PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process  30   1606933521086983644        147 24.79% 29.93% 35.85%   0 Cat4k Mgmt LoPri  29 


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Cisco Switching/Routing :: Not Logging All Levels Of Sylog Messages From Core Switch 4503

Apr 23, 2012

We had a core switch(4503) in our environment and recently we tried to enable syslog in the switch. But the syslog server doesnt receives all the configured level messages from the switch. Following is the only message getting in syslog server after the configuration change in switch.
%SYS-5-CONFIG_I: Configured from console by CWLMS onvty1
(No Traffic related messages like acl deny traffic, spanning tree events etc are getting to syslog server as well as log buffer of the switch)
Following are the logging configuration for the core switch
logging monitor informational
logging facility syslog
logging source-interface Vlan44


1) Is there any more configurations required for getting all traffic related messages, (i mean all possible messages - upto level 7 - debugging)?

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Windows 7 Starter Can't Obtain Valid IP Address From Home Network

Nov 9, 2012

I have recently bought a Asus Eee PC with Windows 7 starter.It will connect ok to public Wifi (i.e. at the Qantas lounge) but will not connect to my home Wifi network - Netcomm N150 Router. The two other computer at home (running full versions of Windows 7) work fine over this network.When I look at the Station list in the Router's interface the MAC address for the new laptop appears but it has no IP address. [code] Have tried the obvious things like power cycling.

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Cisco WAN :: 6509 - MAC Address Flapping In Core Switch

Dec 28, 2010

I am getting following error in Cisco 6509 switch.BUt there is no impact in the switch.
: %MAC_MOVE-SP-4-NOTIF: Host 0000.0c07.ac01 in vlan 694 is flapping between port Te8/1 and port Te7/1
29:33.959: %MAC_MOVE-SP-4-NOTIF: Host 0000.0c07.ac01 in vlan 269 is flapping between port Te7/1 and port Te8/1


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Cisco Switching/Routing :: 4503 / 3560X - Core And Access Switches In IPTV Network Infrastructure?

Jul 8, 2012

recommend a cisco core switch and access switches in IPTV network infrastructure?I was ask to implement a network for IPTV system but i don't have idea what will be the model i will use.
Core Switch = Cisco 4503
Access Switches = Cisco 3560X

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Cisco :: 4503 How To Clear MAC Address Table By SNMP

Jan 23, 2012

I'm looking for a SNMP set command that clear the MAC Address table on a Switch Cisco 4503.

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How To Obtain Ip Address From A Router

Mar 12, 2012

Currently i have multiple computers that are connect via lan with ip addresses(static) that are connected to a cisco router. My question to you, how do you assign more ip addresses to computers on the lan.

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Cisco Switching/Routing :: 4503 - Get Switch For Datacenter?

Feb 9, 2013

We have microsoft servers and other application servers (around 12 in nos) which should have gig connections to the access switch. In turn this access switch will be connected to our distribution switch 4503. Which model of access switch best fits from the below 3 models. It should be cost effective as well.
WS-C2960 S-24PS-L



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Cisco :: WCS 2504 Cannot Obtain Valid IP Address

Apr 8, 2013

I have installed about 2 days ago one Cisco WCS 2504 and 11 APs. Everything is doing well regarding to WEP authentication. But I have a Radius Server that is alson running with some issues on wireless:
- Unless I open network settings and click connect on that config I cannot obtain a valid IP Address;
- Roaming is not working also;

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Obtain DNS Servers Address Automatically?

May 11, 2011

I coulden't visit any websites and it gave me an "error 105" something. So i tried connecting my other comp to the internet cabel with the same result. So i tried to find a solution on the web (wierless internet still worked) and stumbeld upon a similar problem were the answer was to manually fill in an adress in the "internet protocol version 4" properties in the "local area connection" properties. I then noticed that i dident have the "Obtain DNS server address" set to automatically and that the other manual boxes were empty. I then turned the auto on an i had access to internet. Is this safe? Cause i read somewere that DNS server addresess were provided by the company that provide you your internet service, and that you can be redericted to a fake website that can get a hold of your account information on it

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Media Disconnected - Cannot Obtain New Ip Address

Oct 19, 2011

Anyway, I have an hp desktop pc, running windows 7, with high speed cable connection.. Im attempting to obtain a new ip address.. but when I go to command prompt, and type in ipconfig/release, I get an error telling me that "No operation can be performed on Local Area Connection 2 while it has its media disconnected"

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Unable To Obtain IP Address On 2nd Laptop

Feb 7, 2011

I have a netgear wireless router, not sure on the model but can find out if required. My xbox360 is hard wired to the router and my Laptop is connected wirelessly to the router using the internal wireless connection on the laptop. The other half has a laptop too, for some reason her will not connect wirelessly, just gets stuck on a constant loop of ''aquiring ip address'' and does not get past this point. Laptop works if hard wired to the router. how do i get ip address to assign.

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X7675 - Unable To Obtain IP Address?

Aug 28, 2012

I have a Lexmark Professional X7675 that will not connect to my wireless network saying "unable to obtain IP address". This printer was previously connected to the wireless network with no issues. I did a reinstall on my computer and a reset of the printer network settings but still it will not connect to the wireless. The SSID and the WPA are both correct.

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Cisco Switching/Routing :: 4503 - Catalyst L3 Switch Model

Jan 9, 2012

Currently we have cisco 4503 switch in one of our location without redundancy which servers below,
300 user (desktop & ip phones)
5 vlans
15 access switches are connected
one L3 connectivity.
Actually i want to understand is it really necessary to have 4503 or we can go for 4900 series as we are planning to have  redundancy in distribution segment.
Which is the best L3 switch in the above scenario and how to measure the  overall performance of the current 4503 switch...

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Cisco :: WLC 5508 - Clients Can't Obtain IP Address Via DHCP

Mar 29, 2012

I would like to share one problem with WLC 5508 . we added a new virtual interface on the WLC. One new SSID is associated with this interface.
We created a ACL for this interface to restrict the access via WIFI to certian services. It´s not correct that everything works fine because the change were not applied. [code]
The changes of the ACL are applied on the fly, but for reason we don´t know, the clients don´t get a DHCP IP-Address (after changing the ACL) until the Controller is rebooted.

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Android Device Won't Obtain IP Address From Network?

Sep 22, 2011

I just got the motorola droid 3, my first android device. I'm trying to figure out how to get my device to connect to my network as it won't obtain the IP address.I have a Motorola Surfboard SBV5120 Modem and a Microsoft MN-700 router. I just switched from the Palm Pre Plus which connected perfectly to this network, the network is unsecured and has 2 pc's and a 360 running on it. I was able to connect to my friend's wireless network fine at his house.

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RTL8169/8110 Ethernet Will Not Obtain IP Address On Other LAN?

Sep 10, 2012

My Fujitsu Siemens AMILO XI-1554 RTL8169/8110 ethernet will not obtain IP address on any other LAN, except my home network. The adapter is set to obtain IP address automatically. I have updated the drivers using the Update Driver option on Windows 7 Ultimate 32-bit.

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D-Link DIR-655 :: Can't Obtain A DHCP Address For IP Phone

Jun 17, 2011

I have an Avaya IP Phone for work.  This has been tested at work and works as expected.  After the IP Phone boots it's able to obtain an IP address from work.  At home when I plug the IP phone into my DIR-655 router, it's unable to obtain an IP address.  Other network devices are able to obtain an IP address, for example any computer or laptop.  Also my wireless works with no issues expect for the IP phone.  I've already done some searching and found other users with the same issue but I haven't been able to find a solution other than setting a static IP address.  I'm curious why this relatively new router won't work with an IP phone.  I've played with some of the router settings but it didn't make a difference.  Any work around to get the DHCP to work?  I'm running the latest firmware for my router: 1.35A Hardware Versions: A4. 

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Cisco Switching/Routing :: Boot 4503-E Switch From Secondary Image?

Sep 13, 2011

We have Cisco 4503-E switch and software version is cat4500e-universal.SPA.03.01.01.SG.150-1.xo1.bin. Now i have uploaded cat4500e-universal.SPA.03.02.01.SG.150-2.SG1.bin IOS-XE software in the switch and want to boot the switch from this image.

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Cannot Obtain IP In Windows 7

Jan 12, 2011

I've recently reinstalled Windows 7 64 bit on a machine and it was working fantastic. I installed new parts including RAM, hard disk, disk drive, power supply. I rebooted the machine and everything was working perfectly. A few days later I booted and it no longer connects, regardless of being directly connected to the modem, the router, or using a wireless USB dongle purchased from a retail store. The NIC is set up to obtain IP's automatically but an ipconfig /renew gives an error and the built in troubleshooter just states that it can't obtain an IP.

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Home Network :: Netbios Broadcasts - What App Trying To Obtain IP Address

Dec 20, 2011

what application/service is sending out net bios broadcasts on a network segment the requests are for machines that no longer are on the network but something is trying to obtain there ip address as they are not in dns any more i am assuming this is why they are resorting to netbios broadcasts i need to some how isolate what application or service is trying to find out.

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Linksys Wireless Adapters :: WUSB600N - Can't Obtain IP Address

Jan 23, 2011

I've had the adapter for a while now, successfully running on XP SP3 with the linksys software.  I could see networks, connect to them with WPA security and get an IP address.  I recently tried uninstalling the software, then connecting the adapter to install only the drivers and let windows manage it.  Since then, I haven't been able to acquire an IP address.  It can see the SSID and connect to it, but continually tries to acquire an IP address.  I've tried this with different SSIDs at work and home...same result.  I've tried uninstalling the driver from device manager, but every time I restart and connect the adapter, windows recognizes the adapter.  I probably made matters worse by connecting another adapter to it, in an attempt to work around the problem.  That is a USB adapter, WUSB600N.  Tried the same thing, but continually tries to acquire an IP address.

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Cisco :: WLC 2504 / Wired Equipment Doesn't Obtain DHCP Address

Apr 14, 2013

I have two ethernet cards (from same equipment) that arent acquiring IP Address after instalation of WLC 2504.I dont want (yet) to disable DHCP proxy on WLC.
*DHCP Socket Task: Apr 15 18:49:04.219: 00:0a:95:XX DHCP received op BOOTREQUEST (1) (len 556,vlan 0, port 1, encap 0xec00)
*DHCP Socket Task: Apr 15 18:49:04.219: 00:0a:95:XX DHCP dropping packet (no mscb) found - (giaddr, pktInfo->srcPort 68, op: 'BOOTREQUEST')
*DHCP Socket Task: Apr 15 18:49:07.218: 00:0a:95:XX DHCP received op BOOTREQUEST (1) (len 556,vlan 0, port 1, encap 0xec00)
*DHCP Socket Task: Apr 15 18:49:07.218: 00:0a:95:XX DHCP dropping packet (no mscb) found - (giaddr, pktInfo->srcPort 68, op: 'BOOTREQUEST')


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Sharing :: Unable To Obtain IP Address On Local Area Connection?

Nov 5, 2012

I am trying to connect my WDTV Live to my desktop PC, and I connect to the net through a wireless connection to my router. Because its in the other room, I can't connect my WDTV Live to the router without running cable along the floor. Having said that, its not far away from my desktop PC, so I'm trying to connect them directly via cable. The problem is that my WD keeps telling me that it can't obtain an IP address and I don't know how to fix it or what values to put in.I've tried power cycling, manually setting an IP address (, using different cables, all with no success[CODE]

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Can't Obtain IP Address From Wireless Access Point After Few Days Of Uptime?

Dec 12, 2012

My set up is a 2wire router that connects to the internet, with an ethernet power plug connected to it. Over the other side of the house, I have the other ethernet power plug connected, with a Netgear router in access point mode.The main router is on, and the access point is on The DCHP server is enabled on the main router with range 192.168.64 to The access point has the DCHP server turned off. The routers have the same APN and security (WPA2-PSK).Also, the wireless channels don't overlap, channel 1 and 11.Now to my problem:The internet always works fine for a few days when the routers are turned on. But at some point between 1 to 3 days later, every computer can't obtain an IP address while connected to the access point. But all computers can connect to the main router (i.e. when closer to the main router than the access point), and then go near the access point and it keeps the connection. If I reboot the access point, then everything works again for a few days.

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Linksys Access Point :: WAP610N - Unable To Obtain IP Address

Dec 14, 2012

I bought a Linksys WAP610N today, i placed it so i could get a signal where i can't normally.
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I called the technical support, the person there tried to assist me for about 1 hour, we tried different settings, we upgraded firmware from 1.0.01 to 1.0.04, but it didn't worked. Now he said someone will call me tomorrow during the afternoon.
My router isn't Linksys, it's a Netgear, i don't have wireless problem when i connect my tablets or any other wireless device on it, it's just that i bought this WAP610N to have the signal in my bedroom, where i don't get any signal normally.

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Linksys Wireless Router :: WRT54G Failed To Obtain IP Address

Sep 26, 2011

I tried many times to connect my ps3 to the internet/playstation network so far no luck. The router I'm using is a linksys WRT54G v 2.00.8. I have no problem using my WII, PSP, or computer to go online but my ps3 cannot connect to the internet.url...The errors I might sometimes get is "failed to obtain IP adress" and most of the time I get something with unable to connect to  internet server when I am able to get the IP address
I was thinking maybe I shold reset my router to default settings but I'm not sure what's the way to do that or update the router? This problem also has been happening for a week now. In the previous weeks I could easily connect to the internet with no problems and all of a sudden I cannot connect anymore and this has happened a few times already in the past where I am unable to connect to the internet with my ps3 for a few days to a week.

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Cisco Switching/Routing :: 5508 WLC And Nexus 7K - Clients Cannot Obtain IP Address Intermittently

Jan 22, 2013

I have a strange behavior between a WLC 5508 (version and NEXUS7010.
The WLC is configured in DHCP Bridging Mode (it sends DHCP requests without change)
The VLAN interface is configured as follows
interface Vlan501
  ip access-group acl-int-vlan501-in-1 in
  no ip redirects
  ip address
  ip ospf network broadcast
  ip router ospf 100 area
  hsrp 51
Clients can not obtain an IP address intermittently. If I deactivates the ACL when the problem appears(when the client can not obtain an IP@) the probleme is resolved
Note: Before the WLC was connected to Catalyst 6500 and worked properly for 2 years (with same configuration)
I saw this note about differences between DHCP relay on the NEXUS7000/NXOS an Ip helper one the 6500/IOS URL. Do you think the problem may come from the DHCP relay or ACL on the NEXUS.

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Cisco Routers :: RV042 Fails To Obtain WAN IP Address Infinite Lease Time

Aug 24, 2011

I just got a new RV042. V3 Hw.For setup and testing before putting it in action, I've attached the WAN1 side to my internal network.But it fails to get an IP address, and the log shows: "Infinite lease time, exiting".My current router on the LAN is giving out DHCP addresses with 3 hour lease time, and I've checked with the PC's on the LAN that this is correct.The routers DHCP status shows that the lease time for the RV042 is 3 hours ahead.So why does the RV042 complain about long lease time ?Is there a way to avoid this error from occurring?
I have tried to change from 'Gateway' to 'Router', but this does not change anything.Also tried a factory reset, with no luck.Fw is upgraded to the latest

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Xbox 360 Unable To Obtain IP Address From Bridged Wireless Modem Through Ethernet

Feb 6, 2012

I'm trying to connect my Xbox 360 to Live by bridging my computer's wireless connection. I've done this before for a friend in a different city and it worked fine, and I felt very proud of myself for doing so. However when I try to connect here, the modem won't assign my Xbox an IP address. I've been into ipconfig/all and tried to manually assign the same IP address to the Xbox but to no avail. Same deal with the alternate MAC address option.

To speed things along here's the readout from my ipconfig/all:

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.


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Dell :: L501x Administrator Profile Failed To Obtain IP Address From DHCP Server

Feb 20, 2013

2 days ago, my laptop was connected to my router and working fine. But it then randomly disconnected and haven't been able to connect back since. I am using an ethernet cable to access the internet, and have tried many ways to try and resolve the issue but nothing is working.

I have a Dell L501x (Win 7 64-bit) with the Intel Centrino 1000 BGN wifi card. I have restarted the router and modem and disconnected all devices and tried reconnecting, but to no avail. I have tried updating the drivers, system restoring and using safe mode (with network) but nothing works. The modem and router are working fine as other devices connect and access the internet, it is just my laptop that cannot. 

I am sure it is not a hardware issue as the card detects all the surrounding networks. The troubleshooter only says "An administrator profile failed to obtain an IP address from the DHCP server.

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